Just as "Sirāt" is a twisty thriller that takes you unexpected places on its tragic journey into the dystopian desert unknown, the heady filmmaker behind it, Oliver Laxe, is not your average interview. His fourth European feature, "Sirāt" is his breakout: It wowed critics at Cannes, shared the Jury prize, and won the Cannes Soundtrack Award for Best Composer for Kangding Ray.